Editing

I need a way to be able to copy data from a subject line. I don't have any formatting tools at all with Zimbra. I hope I don't have to give up using it because of this. It does other things beautifully but this particular feature I need to be able to use. GMAIL lets me copy it but I can't get any editing features to work in the normal way with Zimbra. Is there something I need to know in order to be able to activate that?